2556263545 has 12 divisors (see below), whose sum is σ = 3371733540. Its totient is φ = 1859100320.

The previous prime is 2556263509. The next prime is 2556263561. The reversal of 2556263545 is 5453626552.

It can be written as a sum of positive squares in 2 ways, for example, as 1689785449 + 866478096 = 41107^2 + 29436^2 .

It is not a de Polignac number, because 2556263545 - 2²⁷ = 2422045817 is a prime.

It is a super-2 number, since 2×2556263545² = 13068966622991934050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2112010 + ... + 2113219.

It is an arithmetic number, because the mean of its divisors is an integer number (280977795).

Almost surely, 2^2556263545 is an apocalyptic number.

It is an amenable number.

2556263545 is a deficient number, since it is larger than the sum of its proper divisors (815469995).

2556263545 is a wasteful number, since it uses less digits than its factorization.

2556263545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4225256 (or 4225245 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 43.

The square root of 2556263545 is about 50559.5049916433. The cubic root of 2556263545 is about 1367.3148865934.

The spelling of 2556263545 in words is "two billion, five hundred fifty-six million, two hundred sixty-three thousand, five hundred forty-five".